Forum Discussion

majdkaid22's avatar
majdkaid22
Helper V
7 years ago

DataFlow possible bug?

Hi Community,   Am getting an error that I have not encountered before.    "The columns parameter must be null, specify the number of columns, specify a list of column names, or specify a table t...
Need Help
v-yuta-msft's avatar
v-yuta-msft
Community Support
7 years ago

majdkaid22 ,

 

After digging, I found out the cause. I have a mapping table in DataFlow, which am merging with other tables coming (non-DataFlow) in the PBI desktop Dataset. 

Up until last last week, everything was working smooth, and no refresh interupttion, and then the above error started coming up.

I copied the mapping table code from the advance editor from DataFlow and put it inside PBI Desktop Dataset, and the error disappeared. 

Have you removed the dataset which is not created by dataflow? If you have, does this issue still exist in power bi service?

Community Support Team _ Jimmy Tao

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

  • majdkaid22's avatar
    majdkaid22
    Helper V
    7 years ago
    v-yuta-msftwhen I created the table in pbi desktop rather than dataflow, the refresh is working fine on the service without any issues.

    Note: The table is created (enter data function in pbi) which I create in pbi desktop usually and I copy the code to dataflow
    • majdkaid22's avatar
      majdkaid22
      Helper V
      7 years ago

      v-yuta-msft any update on the this issue please?

       

      Am getting same error on other reports as well. Any merging or Appending in PBI desktop between table stored in DataFlow and other tables from other sources is causing the problem on PBI service only

      • Anonymous's avatar
        Anonymous
        Not applicable
        7 years ago

        I am getting the same issue across several of my dataflows now.  If I run the sql query inside the dataflow it works but any reference to dataflows outside of that workspace has stopped working all of the sudden!  I'm not sure how to even workaround this issue without undoing all my work.  If this isn't a bug, can someone put me on the right path of what it might be please?

         

        Thanks,

        Scott